DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Osteoarthritis. X-ray of the pelvis of a 65-year-old man with moderate osteoarthritis in the right hip (seen at left) and mild osteoarthritis in the left hip (right). The ball at the top of the femur (thigh bone) fits into the socket of the hip. Normally, there is a clear space between the ball and socket, but here there is little or no space. Osteoarthritis results in the loss of cartilage between the joint. The healing process leads to the growth of bone in place of the cartilage, causing pain, stiffness and loss of mobility. The white specks (lower centre) may be radioactive rods implanted around a cancerous prostate gland or bladder, a method of radiotherapy known as brachytherapy.
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